Drain assembly

ABSTRACT

A drain assembly includes a cup connected to the sink and having an extension tube. A seal and an urging ring are mounted to the cup from the underside of the cup. A positioning plate is fixed to the cup and the extension tube extends through a central hole of the positioning plate. A plurality of bolts extend through the positioning plate and contact against the urging ring. A filtering seal device is connected to the cup. A connector is fixed to the extension tube and a positioning member is threadedly connected to the extension tube of the cup. The positioning member is engaged with the central hole of the positioning plate. By the engagement of the positioning member and the positioning plate, the assembler can quickly position the drain assembly.

FIELD OF THE INVENTION

The present invention relates to a drain assembly which is easily to beinstalled and trash is not trapped in the drain assembly.

BACKGROUND OF THE INVENTION

A conventional drain assembly 1 is shown in FIG. 1 and generallyincludes a cup 11, a seal 12, an urging ring 13, a positioning plate 14,a connector 15 and a filtering seal device. The cup 11 includes a flange111 so as to be connected to a top surface of the sink 4 and anextension tube 112 extends from an underside of the cup 11. Theextension tube 112 includes an outer threaded periphery 113 such thatthe seal 12 and the urging ring 13 are respectively connected to theouter periphery of the cup 11 from an underside of the cup 11. Thepositioning plate 14 includes a hole through which the extension tube112 extends and a plurality of bolts 141 connected to the positioningplate 14 so as to be in contact with the urging ring 13. The connector15 is connected to the sewage pipe (not shown) and the extension tube112. A positioning ring 151 is connected to the connector 15 topositioning the sewage pipe. The filtering seal device includes a basket161, a rubber seal 162, a pull section 163 and a rod 164. The rubberseal 162 is connected to an underside of the basket 161 and fixed to therod 164 on which the pull section 163 is connected. When installing thedrain assembly 1, the positioning plate 14 has to be fixed to a properposition of the extension tube 112 and the bolts 141 are then rotated tocontact against the urging ring 13 such that the drain assembly 1 isfixed to the sink 4. However, it is in convenient for the installers tooperate when installing the positioning plate 14.

As shown in FIG. 2, another drain assembly 2 includes a cup 21, a seal22, an urging ring 23, a positioning plate 24, a connector 25 and afiltering seal device 26. The cup 21 includes a flange 211 so as to beconnected to a top surface of the sink and an extension tube 212 extendsfrom an underside of the cup 21. The extension tube 212 includes anouter threaded periphery 213 and the cup 21 includes a plurality ofrecesses 214 defined in an inner periphery thereof so as to defineprotrusions on the outer periphery of the cup 21. The seal 22 and theurging ring 23 are respectively connected to the outer periphery of thecup 21 from an underside of the cup 21. The positioning plate 24includes a hole through which the extension tube 212 extends and aplurality of notches 241 are defined in an inner periphery or thepositioning plate 24 and the notches 241 are located in correspondencewith the protrusions on the cup 21. A plurality of bolts 242 areconnected to the positioning plate 14 so as to be in contact with theurging ring 23. The connector 25 is connected to the sewage pipe (notshown) and the extension tube 212. A positioning ring 251 is connectedto the connector 25 to positioning the sewage pipe. The filtering sealdevice 26 includes a basket 261, a rubber seal 262, a pull section 263and a rod 264. The rubber seal 262 is connected to an underside of thebasket 261 and fixed to the rod 264 on which the pull section 263 isconnected.

When installing the drain assembly 2, the positioning plate 24 ismounted to the cup 21 with the notches in alignment with the protrusionson the cup 21 and the positioning plate 24 is then rotated to let theprotrusions support the positioning plate 24. The bolts 241 are thenrotated to contact against the urging ring 23 such that the drainassembly 2 is fixed to the sink. Nevertheless, the recesses 214 in thecup 21 trap trash therein and are not easily to remove the trash.

The present invention intends to provide a drain assembly which iseasily to be installed and cleaned.

SUMMARY OF THE INVENTION

The present invention relates to a drain assembly which comprises a cupconnected to the sink and an extension tube extends from an underside ofthe cup. A seal and an urging ring are mounted to the cup from theunderside of the cup. A positioning plate is fixed to the cup and has acentral hole through which the extension tube extends. A plurality ofbolts extend through the positioning plate and contact against theurging ring. A filtering seal device is connected to the cup andincludes a basket, a rubber seal and a rod which extends through thebasket and is connected to the rubber seal. A connector is fixed to theextension tube so as to be connected with a sewage tube. A positioningmember is threadedly connected to the extension tube and engaged withthe central hole of the positioning plate.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of a conventional drain assembly;

FIG. 2 is an exploded view to show another drain assembly;

FIG. 3 is an exploded view to show the drain assembly of the presentinvention;

FIG. 4 is a cross sectional view of the drain assembly of the presentinvention;

FIG. 5 shows a top view of the engagement of the positioning plate andthe positioning member;

FIG. 6 is a cross sectional view to show the rubber seal seals the cup;

FIG. 7 shows that the filtering seal device is pulled upward and the rodis engaged with the hole of the cup, and

FIG. 8 shows another embodiment of the drain assembly.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 3 and 4, the drain assembly 3 of the presentinvention comprises a cup 31 including a flange 311 which is connectedto the sink 4 and an extension tube 312 extends from an underside of thecup 31. The extension tube 312 has an outer threaded periphery 313 and abottom plate 314 is connected to a lower end thereof and a plurality ofholes 315 are defined through the bottom plate 314 so that water anddebris flow through the holes 315. A seal 32 and an urging ring 33 aremounted to the cup 31 from the underside of the cup 31 and located to anunderside of the flange 311.

A positioning plate 35 is fixed to the cup 31 and has a central hole 351through which the extension tube 312 extends. A plurality of bolts 352extend through the positioning plate 35 and contact against the urgingring 33.

A connector 36 is threadedly connected to the extension tube 312 and apositioning ring 361 is connected to an underside of the connector 36 sothat the sewage pipe (not shown) can be positioned with the positioningring 361.

A filtering seal device 37 is connected to the cup 31 and includes abasket 371, a rubber seal 372 and a rod 373 which extends through thebasket 371 and is connected to the rubber seal 372. The rod 273 can becomposed of two parts which are threadedly connected with each other.The rod 273 includes a narrow distal end 374 which can be inserted intoone of the holes 315 in the center of the bottom plate 314 of the cup31.

A positioning member 34 has an inner threaded periphery 341 which isthreadedly connected to the outer threaded periphery 313 of theextension tube 312. The positioning member 34 is sized such that it isengaged with the central hole 351 of the positioning plate 35. Furtherreferring to FIG. 5, a plurality of recesses are defined in an innerperiphery of the central hole 351 of the positioning plate 35 and thepositioning member 34 has a plurality of protrusions 342 extendingradially outward from an outer periphery thereof. When connecting thepositioning member 34 and the positioning plate 35, the protrusions 342of the positioning member 34 extend through the recess of thepositioning plate 35 and are rotated an angle such that the protrusions342 of the positioning member 34 are supported on the inner periphery ofthe central hole 351 of the positioning plate 35. The positioning member34 and the positioning plate 35 can be made as one piece or in separate.

When installing the drain assembly 3, the seal 32 and the positioningmember 34 are mounted to the cup 31 and the positioning plate 35 ismounted to the extension tube 312 to be engaged with the positioningmember 34 as described hereinabove. The bolts 352 are then rotated tocontact against the urging ring 33. The positioning ring 361 is thenconnected to the connector 36 which is fixed to the extension tube 312.

Referring to FIG. 6, when the user wants to seal the drain assembly 3 tostore water in the sink 4, the rubber seal 372 of the seal device 37 isused to seal the inner periphery of the extending tube 312 so that watercan be stored in the sink 4. When the user wants to filter the goodssoaked in the water and drain the water, the seal device 37 is pulledupward as shown in FIG. 7, the water drains from the extension tube 312and the goods is filtered via the basket 371.

As shown in FIG. 8, which shows another embodiment of the drain assembly3, the difference between the embodiment in FIG. 8 and the drainassembly in FIG. 4 is that the extension tube 316 extending from theunder side of the cup 31 includes a smooth outside and the positioningmember 34 has a pre-set length and is glued or welded to the outside of.The positioning member 38 includes an outer threaded periphery 382 andthe connector 36 is threadedly connected to the outer threaded periphery382 and the positioning ring 361 is connected to the connector 36. Thepositioning member 34 includes protrusions 381 extending outward from antop thereof and the central hole 351 of the positioning plate 35includes recesses defined in an inner periphery thereof so that theprotrusions 381 are moved through the recesses and rotated an angle toconnect the positioning member 38 to the positioning plate 35.

The drain assembly 3 includes the positioning member 34 which is locatedat outside of the extension tube 312 and the positioning plate 35includes a central hole 351 which is easily engaged with the positioningmember 34 so that the installers can quickly position the drain assembly3. The positioning member 34 can be made by linear press-cutting orlinear cutting and the positioning member 34 is fixed to the extensiontube 312 by gluing or welding. The installers can quickly connect thepositioning plate 35 to the positioning member 34. Because the extensiontube 312 is positioned by using the positioning member 34 and thepositioning plate 35, so that the inner periphery of the extension tube312 can be smooth which does not trap debris of goods.

While we have shown and described the embodiment in accordance with thepresent invention, it should be clear to those skilled in the art thatfurther embodiments may be made without departing from the scope of thepresent invention.

1. A drain assembly comprising: a cup adapted to be connected to thesink and having an extension tube extending from an underside thereof,the extension tube having an outer threaded periphery; a seal and anurging ring mounted to the cup from the underside of the cup; apositioning plate fixed to the cup and having a central hole throughwhich the extension tube extends, a plurality of bolts extending throughthe positioning plate and contacting against the urging ring; aconnector fixed to the extension tube; a filtering seal device connectedto the cup and including a basket, a rubber seal and a rod which extendsthrough the basket and connected to the rubber seal, and a positioningmember having an inner threaded periphery which is threadedly connectedto the outer threaded periphery of the extension tube, the positioningmember engaged with the central hole of the positioning plate.
 2. Theassembly as claimed in claim 1, wherein a plurality of recesses aredefined in an inner periphery of the central hole of the positioningplate and the positioning member has a plurality of protrusionsextending radially outward from an outer periphery thereof, theprotrusions of the positioning member extend through the recess of thepositioning plate and are rotated an angle such that the protrusions ofthe positioning member are supported on the inner periphery of thecentral hole of the positioning plate.
 3. A drain assembly comprising: acup adapted to be connected to the sink and having an extension tubeextending from an underside thereof, the extension tube having a smoothoutside; a seal and an urging ring mounted to the cup from the undersideof the cup; a positioning plate fixed to the cup and having a centralhole through which the extension tube extends, a plurality of boltsextending through the positioning plate and contacting against theurging ring; a positioning member fixedly connected to the smoothoutside of the extension tube and having an inner threaded periphery,the positioning member engaged with the central hole of the positioningplate; a connector connected to the positioning member, and a filteringseal device connected to the cup and including a basket, a rubber sealand a rod which extends through the basket and connected to the rubberseal.
 4. The assembly as claimed in claim 3, wherein the positioningmember includes protrusions extending outward from an top thereof andthe central hole of the positioning plate includes recesses defined inan inner periphery thereof, the protrusions are moved through therecesses and are rotated an angle to connect the positioning member tothe positioning plate.